Anyone believe in Ghosts ?

I had a "ghostly" encounter a few year back and it happen on the night of my dads
moms wake. That night me, my dad, my step brother and step mother (at the time) were sitting around a table in my dads trailer talking about my grandma. Then the light above the kitchen table we were sitting around went off. So my dad said "maybe its grandma", then he said "mom turn the light back on", but the light didnt come back on. So then he told one of us kids to
say it and so my step brother said "grandma, turn the light back on", and the light came back on. No lie.
Later that night when my dad was in bed he thought about that moment and realized something. My grandma lived next door and was hard of hearing
so when my dad went over to check on her he would flip the lights on and off
to let her know someone was in the house, so that she wouldnt be shocked to suddenly see someone in the house, really so she woudlnt have a heart attack from the surprise. My dad has also said he wouldnt ever want to see
a ghost of any family member, because it would frighten him. So he believes
that maybe the light going off and then back on after my step brother said what he said, was my grandmas way of saying goodbye.
This story seems so "ghost story" but it happen to me and when i think about it i cant believe it actually happen. Now it could have been just chance that the light went off, and then back on when my step brother
said what he said, but i just dont think thats what happen. If it wasnt my grandma that night, then it could have been some THING playing on our hopes
of an afterlife. Ill never know for sure until the day i die.